Promethazine Hydrochloride Injection for Veterinary Purpose is manufactured by Alpa Laboratories Limited. Promethazine Hydrochloride Injection comes in 25 mg / ml pack. This injection is Antiemetic. Alpa Laboratories Limited is WHO-GMP and ISO 9001:2000 registered organization. Alpa Laboratories Limited also manufactures ethical drugs, counter drugs [OTC] and veterinary products in various formulations.